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J. STEINER.

TELEGRAPH INSTRUMENT.

No. 354,814. Patented Dec. 21, 1886.

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J. STBINBR. TELEGRAPH INSTRUMENT.

No. 354,814. Patented Dec, 21, 1886.

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ATENT JOSEF srnnvnn, on BROOKLYN, ASSIGNOR TO HASKINS & srnrnnaon NEWYORK, v. Y.

TELEGRAPH-INSTRUM ENT.

SPECIFICATION forming part of Letters Patent No. 354,814, dated December21,1886.

' Application filed July 31, 1886.

To all whem it may concern:

Be it known that I, J osn'n STEINER, a -citizen of the United States,residing in Brooklyn, in the county of Kings and State of New York, haveinvented certain new and useful Improvements in Telegraph-Instruments,of which the following is a specification.

My invention relates to the construction of the supporting parts of thelevers of vari ous forms of electric instruments-such, for instance, astelegraphic keys, sounders, -relays, &c. I

The object of the invention is to provide a convenient, economical, andefficient form of support, and one which may be easily and accuratelyadjusted.

The invention consists, in general terms, in supporting the lever bymeans of a flat resilient spring, one end of which is secured to theframe or body of the instrument, while the other end is secured to thelever. Between the two ends of the spring there extends a rigid shoulderor fulcrum, upon which the spring rests, and across which it bends whenthe lever is operated. Suitable means are provided for modifying thepressure exerted upon the spring between the shoulder and the support orframe, thereby giving to the lever a greater or less tendency to move inthe opposite direction. This may be accomplished in various ways. Themethod shown in the present instance consists simply of anadjustingscrew, which by bearing against the spring tends to rock itupon the shoulder or fulcrum. The greater the pressure of the screw, thegreater will be the force required to actuate the lever.

In the accompanying drawings, Figures 1 and 2 are respectively a planand a side elevation of a telegraphic key embodying the features of theinvention, and Figs. 3 and 4 are like views of a telegraphic sounder. Inanother application of even date herewith there is shown a special formof adjustment for devices of this character.

Referring to thefigures, A represents th support or base of a key, andBa key-lever. A spring, 0, is secured at one end to the base by a screw,0. The other end of the spring is secured to the lever B by means of asuitable clamp, b,which may be brazed or in any other suitable wayfastened to the lever. The sup- Serial No. 209,605. (No model.)

port A is hollowed beneath the spring 0, as shown at d, and the springrests against the shoulder or fulcrum a, extending fromthe base, nearthe point of attachment, to the lever. It is evident that when the leveris depressed the spring must bend across the shoulder or fulcrum, andfor the purpose of modifying the effort required to move the lever,

and thusbend the spring, means are provided for causing the portion ofthe spring upon the side of the shoulder opposite the lever to bepressed down with more or less force, as required. A convenient methodof accomplishing this consistsin extending athreaded screwrod, f, upwardfrom the base through an opening in the spring. A nut,f, turning uponthis screw, presses against the spring, causing it to be depressed intothe cavity d more or less, as required.

The key is provided with the usual anvil, g, and circuitclosing point g.The screw-post h, which is employed for holding the switch H inposition, extends upward through the body of the key-lever, and isprovided with a set-screw, h, for limiting the play of the keylever. Twoposts, K K which are employed for holding the key to the table, may berespectively the posts receiving the screw 0 and the anvil g. The leverBof the sounder shown in Figs. 3 and 4 is supported in essentially thesame manner, such modifications in construction being made as arerequired to adapt it to the special application. v

The suppoitingpost M, extending from the base of theinstrun1ent,'carries the plate M, to which the spring 0 is attached bymeans of the screw 0. The support M is provided with the shoulderorfulcrum a, and the lever B is attached to the spring beyond the shoulderin any convenient manner. This instrument is also equipped with an adjusting-screw, f, and nut, f, acting in the same manner as those employedupon the key.

I claim as my invention- 1 In a telegraphic instrument, a movable lever,a spring supporting the lever, an adjustable support for one end of thespring, and a fulcrum for said spring between the support and the lever.

2. In a telegraphic instrument, a lever, a spring supporting the lever,a rigid support at one end, a transverse fulcrum forsaid spring,

fulcrum for the spring, and an adjusting device for modifyingthepressure ofthe spring against said fulcrum.

In testimony whereof I have hereunto sub- 15 scribed my name this 27thday of July, A. D. 1886.

JosEF STEINER;

Witnesses:

DANL. W. EDGECOMB, CHARLES A. TERRY.

